Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754217AbbHaTgk (ORCPT ); Mon, 31 Aug 2015 15:36:40 -0400 Received: from shards.monkeyblade.net ([149.20.54.216]:51434 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752337AbbHaTga (ORCPT ); Mon, 31 Aug 2015 15:36:30 -0400 Date: Mon, 31 Aug 2015 12:36:28 -0700 (PDT) Message-Id: <20150831.123628.1591879942458458246.davem@davemloft.net> To: ast@plumgrid.com Cc: fengguang.wu@intel.com, linux@roeck-us.net, rostedt@goodmis.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next] lib: move strncpy_from_unsafe() into mm/maccess.c From: David Miller In-Reply-To: <1441036630-10124-1-git-send-email-ast@plumgrid.com> References: <1441036630-10124-1-git-send-email-ast@plumgrid.com> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 31 Aug 2015 12:36:29 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1356 Lines: 30 From: Alexei Starovoitov Date: Mon, 31 Aug 2015 08:57:10 -0700 > To fix build errors: > kernel/built-in.o: In function `bpf_trace_printk': > bpf_trace.c:(.text+0x11a254): undefined reference to `strncpy_from_unsafe' > kernel/built-in.o: In function `fetch_memory_string': > trace_kprobe.c:(.text+0x11acf8): undefined reference to `strncpy_from_unsafe' > > move strncpy_from_unsafe() next to probe_kernel_read/write() > which use the same memory access style. > > Reported-by: Fengguang Wu > Reported-by: Guenter Roeck > Fixes: 1a6877b9c0c2 ("lib: introduce strncpy_from_unsafe()") > Signed-off-by: Alexei Starovoitov > --- > For configs without kprobes and bpf the cost of this unused function is > ~200 bytes which I think is a better trade off vs creating > new Kconfig selector just for this single function. > Another alternative is to move it to kernel/trace/trace_kprobe.c, > but then it will lose generality and probably should be removed > from include/linux/uaccess.h, so mm/maccess.c looks the best. Ok, applied. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/